Advances in the Study of Schistosomiasis: the Postgenomic Era

Total Page:16

File Type:pdf, Size:1020Kb

Advances in the Study of Schistosomiasis: the Postgenomic Era Journal of Parasitology Research Advances in the Study of Schistosomiasis: The Postgenomic Era Guest Editors: Cristina Toscano Fonseca, Sergio Costa Oliveira, Andrea Teixeira-Carvalho, and Rashika El Ridi Advances in the Study of Schistosomiasis: The Postgenomic Era Journal of Parasitology Research Advances in the Study of Schistosomiasis: The Postgenomic Era Guest Editors: Cristina ToscanoFonseca, Sergio Costa Oliveira, Andrea Teixeira-Carvalho, and Rashika El Ridi Copyright © 2013 Hindawi Publishing Corporation. All rights reserved. This is a special issue published in “Journal of Parasitology Research.” All articles are open access articles distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Editorial Board Takeshi Agatsuma, Japan Ana Maria Jansen, Brazil A. F. Petavy, France Jeffrey Bethony, USA MariaV.Johansen,Denmark Benjamin M. Rosenthal, USA Dave Chadee, USA Nirbhay Kumar, USA Joseph Schrevel, France Kwang Poo Chang, USA D. S. Lindsay, USA Jose´ F. Silveira, Brazil Wej Choochote, Thailand Bernard Marchand, France M. J. Stear, UK Alvin A. Gajadhar, Canada Renato A. Mortara, Brazil Xin-zhuan Su, USA C. Genchi, Italy Domenico Otranto, Italy Kazuyuki Tanabe, Japan Boyko B. Georgiev, Bulgaria Barbara Papadopoulou, Canada Contents Advances in the Study of Schistosomiasis: The Postgenomic Era, Cristina Toscano Fonseca, Sergio Costa Oliveira, Andrea Teixeira-Carvalho, and Rashika El Ridi Volume 2013, Article ID 849103, 2 pages Cytokine Pattern of T Lymphocytes in Acute Schistosomiasis mansoni Patients following Treated Praziquantel Therapy, Denise Silveira-Lemos, Matheus Fernandes Costa-Silva, Amanda Cardoso de Oliveira Silveira, Mauricio Azevedo Batista, Lucia´ Alves Oliveira-Fraga, Alda Maria Soares Silveira, Maria Carolina Barbosa Alvarez, Olindo Assis Martins-Filho, Giovanni Gazzinelli, Rodrigo Correa-Oliveira,ˆ and Andrea´ Teixeira-Carvalho Volume 2013, Article ID 909134, 13 pages Cytokine and Chemokine Profile in Individuals with Different Degrees of Periportal Fibrosis due to Schistosoma mansoni Infection, Robson Da Paixao˜ De Souza, Luciana Santos Cardoso, Giuseppe Tittoni Varela Lopes, Maria Cec´ılia F. Almeida, Ricardo Riccio Oliveira, Leda Maria Alcantara,ˆ Edgar M. Carvalho, and Maria Ilma Araujo Volume 2012, Article ID 394981, 10 pages New Frontiers in Schistosoma Genomics and Transcriptomics, Laila A. Nahum, Marina M. Mourao,˜ and Guilherme Oliveira Volume 2012, Article ID 849132, 11 pages Changes in T-Cell and Monocyte Phenotypes In Vitro by Schistosoma mansoni Antigens in Cutaneous Leishmaniasis Patients, Aline Michelle Barbosa Bafica, Luciana Santos Cardoso, Sergio´ Costa Oliveira, Alex Loukas, Alfredo Goes,´ Ricardo Riccio Oliveira, Edgar M. Carvalho, and Maria Ilma Araujo Volume 2012, Article ID 520308, 10 pages Transcriptional Profile and Structural Conservation of SUMO-Specific Proteases in Schistosoma mansoni, Roberta Verciano Pereira, Fernanda Janku Cabral, Matheus de Souza Gomes, Liana Konovaloff Jannotti-Passos, William Castro-Borges, and Renata Guerra-Sa´ Volume 2012, Article ID 480824, 7 pages Schistosoma Tegument Proteins in Vaccine and Diagnosis Development: An Update, Cristina Toscano Fonseca, Gardeniaˆ Braz Figueiredo Carvalho, Clarice Carvalho Alves, and Tatiane Teixeira de Melo Volume 2012, Article ID 541268, 8 pages Pathogenicity of Trichobilharzia spp. for Vertebrates,LichtenbergovaLucieandHor´ ak´ Petr Volume 2012, Article ID 761968, 9 pages Hindawi Publishing Corporation Journal of Parasitology Research Volume 2013, Article ID 849103, 2 pages http://dx.doi.org/10.1155/2013/849103 Editorial Advances in the Study of Schistosomiasis: The Postgenomic Era Cristina Toscano Fonseca,1 Sergio Costa Oliveira,2 Andrea Teixeira-Carvalho,1 and Rashika El Ridi3 1 Centro de Pesquisas ReneRachou,Fundac´ ¸ao˜ Oswaldo Cruz, 30190-002 Belo Horizonte, MG, Brazil 2 Department of Biochemistry and Immunology, Federal University of Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil 3 Zoology Department, Faculty of Science, Cairo University, Giza 12613, Egypt Correspondence should be addressed to Cristina Toscano Fonseca; [email protected] Received 3 March 2013; Accepted 3 March 2013 Copyright © 2013 Cristina Toscano Fonseca et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Schistosomiasis remains a serious public health problem in In this special issue, a review by C. T. Fonseca et al. 76 countries and territories of the world, with more than givesanupdateonhowparasitegenomestogetherwith 200 million individuals infected, causing annual losses of 10.4 bioinformatics tools have helped in vaccine and diagnosis million in DALYs (disability adjusted to life years). Although development in the last few years. Since the parasite surface effective drugs against schistosomiasis are used in disease represents an interesting target for the host immune system, control programs, the prevalence of the disease remains this review was focused on parasite tegument as a source of unaltered, and new diseases foci and acute outbreaks are antigens. observed worldwide. Also, drug resistance by the parasites is Although the genome from the three most socioeconom- a concern, and new drugs and alternative control measures ically important schistosome species had already been pub- need to be developed. lished, many questions continue to challenge researchers. The An effective vaccine against schistosomiasis is an alterna- review by L. A. Nahum and coworkers discusses the advances tive and desirable tool to help in the disease control; however, on schistosome genomics and transcriptomics studies and thecomplexschistosomelifecycleandthecomplexityof point out the gaps and future directions in this research field. its interaction with the host immune system turn vaccine An example on how parasite genome database helps development into a difficult task. Neither drug development in understanding the parasite biology is presented in the nor vaccine development is sufficient to ensure the success paper by R. V. Pereira and colleagues. In their article, of schistosomiasis control programs. As a matter of fact, the using in silico analysis, they identified in the S. mansoni combination of an effective vaccine together with chemother- genome orthologs of the mammalian Sentrin/SUMO-specific apy is the strategy of choice. Many studies also demonstrate proteases (SENPs) 1 and 7,which are involved in many cellular that without a more sensitive diagnosis test, able to detect processes. The S. mansoni SENPs transcriptional profile as individuals with low parasite burden, no control strategy well as its structural conservation was analyzed. will achieve the desirable result which nowadays is diseases Just as important as understanding the biology of the elimination. parasite is deciphering how the host immune system deals The access to the genome from Schistosoma man- with schistosome infection and its relation to the pathogene- soni, Schistosoma japonicum, and Schistosoma haematobium sis of the disease. Clinically schistosomiasis is characterized recently published is expected to increase rapidly our under- bytwodistinctphases:theacuteandthechronicphase. standing of the parasite biology and also accelerate the The acute phase is commonly observed in individuals living development of new drugs, vaccine, and diagnosis methods in nonendemic area, while chronic phase is observed in by helping in the identification of new targets. endemic-area residents. 2 Journal of Parasitology Research D. Silveira-Lemos et al. evaluated in their article immuno- logical parameters in patients with acute schistosomiasis before and after praziquantel treatment. Interesting differ- ences are demonstrated by the authors between noninfected, acute, and treated group, and a role for CD8+ T cells as a source of cytokines in acute patients is pointed by this study. The cytokine and chemokine profile observed in PBMCs from individuals infected with S. mansoni in response to specific stimulation and its correlation with different degrees of periportal fibrosis is described by R. P. de Souza and colleagues in their research article. Their results indicate potential biomarkers for the progression of liver pathology duetoschistosomiasis. Many schistosome antigens have been described to modulate inflammatory diseases such as asthma. A. M. B. Baficaetal.evaluatedintheirarticletheimpactofthe S. mansoni antigens: Sm29, TSP-2, and PIII in PBMCs culture from cutaneous leishmaniasis patients stimulated with L. braziliensis antigen. Their results demonstrated that schistosomeantigensinduceamodulatoryphenotypewith decreased monocyte activation and increased expression of T-lymphocyte modulatory molecules. Trichobilharzia spp. infection results in bird schistoso- miases, which causes severe pathogenic impact in birds and frequently results in cercarial dermatitis in humans. In their article, L. Lucie and H. Petr review the pathogenesis of bird schistosomiasis and the immune response triggered by Trichobilharzia spp. infection with emphasis on the new species T. regent. We hope you enjoy reading this special issue! Cristina Toscano Fonseca Sergio Costa Oliveira Andrea Teixeira-Carvalho Rashika El Ridi Hindawi Publishing Corporation Journal of Parasitology Research Volume 2013, Article ID 909134,
Recommended publications
  • Schistosomiasis
    MODULE \ Schistosomiasis For the Ethiopian Health Center Team Laikemariam Kassa; Anteneh Omer; Wutet Tafesse; Tadele Taye; Fekadu Kebebew, M.D.; and Abdi Beker Haramaya University In collaboration with the Ethiopia Public Health Training Initiative, The Carter Center, the Ethiopia Ministry of Health, and the Ethiopia Ministry of Education January 2005 Funded under USAID Cooperative Agreement No. 663-A-00-00-0358-00. Produced in collaboration with the Ethiopia Public Health Training Initiative, The Carter Center, the Ethiopia Ministry of Health, and the Ethiopia Ministry of Education. Important Guidelines for Printing and Photocopying Limited permission is granted free of charge to print or photocopy all pages of this publication for educational, not-for-profit use by health care workers, students or faculty. All copies must retain all author credits and copyright notices included in the original document. Under no circumstances is it permissible to sell or distribute on a commercial basis, or to claim authorship of, copies of material reproduced from this publication. ©2005 by Laikemariam Kassa, Anteneh Omer, Wutet Tafesse, Tadele Taye, Fekadu Kebebew, and Abdi Beker All rights reserved. Except as expressly provided above, no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without written permission of the author or authors. This material is intended for educational use only by practicing health care workers or students and faculty in a health care field. ACKNOWLEDGMENTS The authors are grateful to The Carter Center and its staffs for the financial, material, and moral support without which it would have been impossible to develop this module.
    [Show full text]
  • Waterborne Zoonotic Helminthiases Suwannee Nithiuthaia,*, Malinee T
    Veterinary Parasitology 126 (2004) 167–193 www.elsevier.com/locate/vetpar Review Waterborne zoonotic helminthiases Suwannee Nithiuthaia,*, Malinee T. Anantaphrutib, Jitra Waikagulb, Alvin Gajadharc aDepartment of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Henri Dunant Road, Patumwan, Bangkok 10330, Thailand bDepartment of Helminthology, Faculty of Tropical Medicine, Mahidol University, Ratchawithi Road, Bangkok 10400, Thailand cCentre for Animal Parasitology, Canadian Food Inspection Agency, Saskatoon Laboratory, Saskatoon, Sask., Canada S7N 2R3 Abstract This review deals with waterborne zoonotic helminths, many of which are opportunistic parasites spreading directly from animals to man or man to animals through water that is either ingested or that contains forms capable of skin penetration. Disease severity ranges from being rapidly fatal to low- grade chronic infections that may be asymptomatic for many years. The most significant zoonotic waterborne helminthic diseases are either snail-mediated, copepod-mediated or transmitted by faecal-contaminated water. Snail-mediated helminthiases described here are caused by digenetic trematodes that undergo complex life cycles involving various species of aquatic snails. These diseases include schistosomiasis, cercarial dermatitis, fascioliasis and fasciolopsiasis. The primary copepod-mediated helminthiases are sparganosis, gnathostomiasis and dracunculiasis, and the major faecal-contaminated water helminthiases are cysticercosis, hydatid disease and larva migrans. Generally, only parasites whose infective stages can be transmitted directly by water are discussed in this article. Although many do not require a water environment in which to complete their life cycle, their infective stages can certainly be distributed and acquired directly through water. Transmission via the external environment is necessary for many helminth parasites, with water and faecal contamination being important considerations.
    [Show full text]
  • The Complete Mitochondrial Genome of Echinostoma Miyagawai
    Infection, Genetics and Evolution 75 (2019) 103961 Contents lists available at ScienceDirect Infection, Genetics and Evolution journal homepage: www.elsevier.com/locate/meegid Research paper The complete mitochondrial genome of Echinostoma miyagawai: Comparisons with closely related species and phylogenetic implications T Ye Lia, Yang-Yuan Qiua, Min-Hao Zenga, Pei-Wen Diaoa, Qiao-Cheng Changa, Yuan Gaoa, ⁎ Yan Zhanga, Chun-Ren Wanga,b, a College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China b College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China ARTICLE INFO ABSTRACT Keywords: Echinostoma miyagawai (Trematoda: Echinostomatidae) is a common parasite of poultry that also infects humans. Echinostoma miyagawai Es. miyagawai belongs to the “37 collar-spined” or “revolutum” group, which is very difficult to identify and Echinostomatidae classify based only on morphological characters. Molecular techniques can resolve this problem. The present Mitochondrial genome study, for the first time, determined, and presented the complete Es. miyagawai mitochondrial genome. A Comparative analysis comparative analysis of closely related species, and a reconstruction of Echinostomatidae phylogeny among the Phylogenetic analysis trematodes, is also presented. The Es. miyagawai mitochondrial genome is 14,416 bp in size, and contains 12 protein-coding genes (cox1–3, nad1–6, nad4L, cytb, and atp6), 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs), and one non-coding region (NCR). All Es. miyagawai genes are transcribed in the same direction, and gene arrangement in Es. miyagawai is identical to six other Echinostomatidae and Echinochasmidae species. The complete Es. miyagawai mitochondrial genome A + T content is 65.3%, and full- length, pair-wise nucleotide sequence identity between the six species within the two families range from 64.2–84.6%.
    [Show full text]
  • Complete Mitochondrial Genome of Haplorchis Taichui and Comparative Analysis with Other Trematodes
    ISSN (Print) 0023-4001 ISSN (Online) 1738-0006 Korean J Parasitol Vol. 51, No. 6: 719-726, December 2013 ▣ ORIGINAL ARTICLE http://dx.doi.org/10.3347/kjp.2013.51.6.719 Complete Mitochondrial Genome of Haplorchis taichui and Comparative Analysis with Other Trematodes Dongmin Lee1, Seongjun Choe1, Hansol Park1, Hyeong-Kyu Jeon1, Jong-Yil Chai2, Woon-Mok Sohn3, 4 5 6 1, Tai-Soon Yong , Duk-Young Min , Han-Jong Rim and Keeseon S. Eom * 1Department of Parasitology, Medical Research Institute and Parasite Resource Bank, Chungbuk National University School of Medicine, Cheongju 361-763, Korea; 2Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, Seoul 110-799, Korea; 3Department of Parasitology and Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju 660-70-51, Korea; 4Department of Environmental Medical Biology, Institute of Tropical Medicine and Arthropods of Medical Importance Resource Bank, Yonsei University College of Medicine, Seoul 120-752, Korea; 5Department of Immunology and Microbiology, Eulji University School of Medicine, Daejeon 301-746, Korea; 6Department of Parasitology, Korea University College of Medicine, Seoul 136-705, Korea Abstract: Mitochondrial genomes have been extensively studied for phylogenetic purposes and to investigate intra- and interspecific genetic variations. In recent years, numerous groups have undertaken sequencing of platyhelminth mitochon- drial genomes. Haplorchis taichui (family Heterophyidae) is a trematode that infects humans and animals mainly in Asia, including the Mekong River basin. We sequenced and determined the organization of the complete mitochondrial genome of H. taichui. The mitochondrial genome is 15,130 bp long, containing 12 protein-coding genes, 2 ribosomal RNAs (rRNAs, a small and a large subunit), and 22 transfer RNAs (tRNAs).
    [Show full text]
  • Lecture 18 Feb 24 Shisto.Pdf
    Digeneans: All life cycles involve a mollusc and a vertebrate All life cycles are similar but different All life cycles are a variation of one theme. Adult-egg-miracidium-[black box of sprorocyst/rediae] Cercariae leave snail (usually): 1) penetrate host (definitive or intermediate) 2) encyst on vegetation Among human parasitic diseases, schistosomiasis (sometimes called bilharziasis) ranks second behind malaria in terms of socio-economic and public health importance in tropical and subtropical areas. The disease is endemic in 74 developing countries, infecting more than 200 million people in rural agricultural and peri-urban areas. Of these, 20 million suffer severe consequences from the disease and 120 million are symptomatic. In many areas, schistosomiasis infects a large proportion of under-14 children. An estimated 500-600 million people worldwide are at risk from the disease Globally, about 120 million of the 200 million infected people are estimated to be symptomatic, and 20 million are thought to suffer severe consequences of the infection. Yearly, 20,000 deaths are estimated to be associated with schistosomiasis. This mortality is mostly due to bladder cancer or renal failure associated with urinary schistosomiasis and to liver fibrosis and portal hypertension associated with intestinal schistosomiasis. Biogeography The major forms of human schistosomiasis are caused by five species of water- borne flatworm, or blood flukes, called schistosomes: Schistosoma mansoni causes intestinal schistosomiasis and is prevalent in 52 countries and territories of Africa, Caribbean, the Eastern Mediterranean and South America Schistosoma japonicum/Schistosoma mekongi cause intestinal schistosomiasis and are prevalent in 7 African countries and the Pacific region Schistosoma intercalatum is found in ten African countries Schistosoma haematobium causes urinary schistosomiasis and affects 54 countries in Africa and the Eastern Mediterranean.
    [Show full text]
  • Praziquantel Treatment in Trematode and Cestode Infections: an Update
    Review Article Infection & http://dx.doi.org/10.3947/ic.2013.45.1.32 Infect Chemother 2013;45(1):32-43 Chemotherapy pISSN 2093-2340 · eISSN 2092-6448 Praziquantel Treatment in Trematode and Cestode Infections: An Update Jong-Yil Chai Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, Seoul, Korea Status and emerging issues in the use of praziquantel for treatment of human trematode and cestode infections are briefly reviewed. Since praziquantel was first introduced as a broadspectrum anthelmintic in 1975, innumerable articles describ- ing its successful use in the treatment of the majority of human-infecting trematodes and cestodes have been published. The target trematode and cestode diseases include schistosomiasis, clonorchiasis and opisthorchiasis, paragonimiasis, het- erophyidiasis, echinostomiasis, fasciolopsiasis, neodiplostomiasis, gymnophalloidiasis, taeniases, diphyllobothriasis, hyme- nolepiasis, and cysticercosis. However, Fasciola hepatica and Fasciola gigantica infections are refractory to praziquantel, for which triclabendazole, an alternative drug, is necessary. In addition, larval cestode infections, particularly hydatid disease and sparganosis, are not successfully treated by praziquantel. The precise mechanism of action of praziquantel is still poorly understood. There are also emerging problems with praziquantel treatment, which include the appearance of drug resis- tance in the treatment of Schistosoma mansoni and possibly Schistosoma japonicum, along with allergic or hypersensitivity
    [Show full text]
  • Heterobilharzia Americana in Dogs: Characterizing Clinical
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Texas A&M Repository HETEROBILHARZIA AMERICANA IN DOGS: CHARACTERIZING CLINICAL INFECTION, EVALUATING DIAGNOSTIC TEST PERFORMANCE, AND EXPLORING NOVEL METHODS OF DIAGNOSIS A Dissertation by JESSICA YVONNE RODRIGUEZ Submitted to the Office of Graduate and Professional Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Chair of Committee, Karen Snowden Committee Members, Christine Budke Charles Criscione Barbara Lewis Head of Department, Ramesh Vemulapalli August 2017 Major Subject: Veterinary Pathobiology Copyright 2017 Jessica Yvonne Rodriguez ABSTRACT Heterobilharzia americana is a waterborne trematode parasite (Family: Schistosomatidae) of dogs. More complete information regarding clinical, geographic, and diagnostic aspects of this parasite is needed to aid in more effective awareness and diagnosis. A total of 238 cases diagnosed through the Texas A&M Veterinary Medical Diagnostic Laboratory, Texas A&M Veterinary Medical Teaching Hospital, Texas A&M Diagnostic Parasitology Service, and Texas A&M Gastrointestinal Laboratory were reviewed. Cases were distributed primarily in the eastern region of Texas. Clinical signs were diarrhea (67%), weight loss (38%), anorexia/hyporexia (27%), vomiting (22%), hematochezia (20%), lethargy (17%), and polyuria/polydipsia (6%). H. americana was attributed to death in 20 of 39 necropsy cases. Trematode eggs were identified histologically in the small intestine (84%), liver (84%), large intestine (39%), pancreas (35%), lung (9%), lymph node (8%), and spleen (4%). A total of 69 dogs were enrolled in a diagnostic methods comparison study. Relative test sensitivities were 50% (29.1-70.9) for fecal saline sedimentation, 58.3% (36.6-77.9) for PCR of fresh feces, and 95.8% (78.9-99.9) for PCR of fecal sediment.
    [Show full text]
  • Be Aware of Schistosomiasis | 2015 1 Fig
    From our Whitepaper Files: Be Aware of > See companion document Schistosomiasis World Schistosomiasis 2015 Edition Risk Chart Canada 67 Mowat Avenue, Suite 036 Toronto, Ontario M6K 3E3 (416) 652-0137 USA 1623 Military Road, #279 Niagara Falls, New York 14304-1745 (716) 754-4883 New Zealand 206 Papanui Road Christchurch 5 www.iamat.org | [email protected] | Twitter @IAMAT_Travel | Facebook IAMATHealth THE HELPFUL DATEBOOK It was clear to him that this young woman must It’s noon, the skies are clear, it is unbearably have spent some time in Africa or the Middle hot and a caravan snakes its way across the East where this type of worm is prevalent. When Sahara. Twenty-eight people on camelback are interviewed she confirmed that she had been heading towards the oasis named El Mamoun. in Africa, participating in one of the excursions They are tourists participating in ‘La Sahari- organized by the club. enne’, a popular excursion conducted twice weekly across the desert of southern Tunisia The young woman did not have cancer at all, by an international travel club. In the bound- but had contracted schistosomiasis while less Sahara, they were living a fascinating swimming in the oasis pond. When investiga- experience, their senses thrilled by the majestic tors began to fear that other members of her grandeur of the desert. After hours of riding, group might also be infected, her date book they reached the oasis and were dazzled to see came to their aid. Many of her companions had Fig. 1 Biomphalaria fresh-water snail. a clear pond fed by a bubbling spring.
    [Show full text]
  • Bench Aids for the Diagnosis of Intestinal Parasites
    Bench aids for the diagnosis of intestinal parasites second edition These bench aids were planned and produced by Professor Marco Genchi, Department of Veterinary Sciences, University of Parma, Parma, Italy Mr Idzi Potters, BSc, Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium Ms Rina G. Kaminsky, MSc, Department of Paediatrics, School of Medical Sciences, National Autonomous University, Honduras and Parasitology Service, Department of Clinical Laboratory, University Hospital, Honduras Dr Antonio Montresor, Preventive Chemotherapy and Transmission Control, Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland Dr Simone Magnino, Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna, Bruno Ubertini, Pavia, Italy Acknowledgements The World Health Organization (WHO) thanks the Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” for financially and technically supporting the preparation of this document. Many thanks also go to the Institute of Tropical Medicine of Antwerp for making available its extensive image library. Thanks are also due to Dr Shaali Ame, WHO Collaborating Centre for Neglected Tropical Diseases, Parasitology Unit, Public Health Laboratory Ivo de Carneri, Pemba, United Republic of Tanzania Professor Giuseppe Cringoli, Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, Naples, Italy Dr Yvette Endriss, Swiss Tropical and Public Health Institute,
    [Show full text]
  • Differing Effects of Standard and Harsh Nucleic Acid Extraction Procedures on Diagnostic Helminth Real-Time Pcrs Applied to Human Stool Samples
    pathogens Article Differing Effects of Standard and Harsh Nucleic Acid Extraction Procedures on Diagnostic Helminth Real-Time PCRs Applied to Human Stool Samples Tanja Hoffmann 1, Andreas Hahn 2 , Jaco J. Verweij 3 ,Gérard Leboulle 4, Olfert Landt 4, Christina Strube 5 , Simone Kann 6, Denise Dekker 7 , Jürgen May 7 , Hagen Frickmann 1,2,† and Ulrike Loderstädt 8,*,† 1 Department of Microbiology and Hospital Hygiene, Bundeswehr Hospital Hamburg, 20359 Hamburg, Germany; [email protected] (T.H.); [email protected] or [email protected] (H.F.) 2 Institute for Medical Microbiology, Virology and Hygiene, University Medicine Rostock, 18057 Rostock, Germany; [email protected] 3 Laboratory for Medical Microbiology and Immunology, Elisabeth Tweesteden Hospital, 5042 AD Tilburg, The Netherlands; [email protected] 4 TIB MOLBIOL, 12103 Berlin, Germany; [email protected] (G.L.); [email protected] (O.L.) 5 Institute for Parasitology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; [email protected] 6 Medical Mission Institute, 97074 Würzburg, Germany; [email protected] 7 Infectious Disease Epidemiology Department, Bernhard Nocht Institute for Tropical Medicine Hamburg, 20359 Hamburg, Germany; [email protected] (D.D.); [email protected] (J.M.) Citation: Hoffmann, T.; Hahn, A.; 8 Department of Hospital Hygiene & Infectious Diseases, University Medicine Göttingen, Verweij, J.J.; Leboulle, G.; Landt, O.; 37075 Göttingen, Germany Strube, C.; Kann, S.; Dekker, D.; * Correspondence: [email protected] May, J.; Frickmann, H.; et al. Differing † Hagen Frickmann and Ulrike Loderstädt contributed equally to this work. Effects of Standard and Harsh Nucleic Acid Extraction Procedures Abstract: This study aimed to assess standard and harsher nucleic acid extraction schemes for on Diagnostic Helminth Real-Time diagnostic helminth real-time PCR approaches from stool samples.
    [Show full text]
  • Classification and Nomenclature of Human Parasites Lynne S
    C H A P T E R 2 0 8 Classification and Nomenclature of Human Parasites Lynne S. Garcia Although common names frequently are used to describe morphologic forms according to age, host, or nutrition, parasitic organisms, these names may represent different which often results in several names being given to the parasites in different parts of the world. To eliminate same organism. An additional problem involves alterna- these problems, a binomial system of nomenclature in tion of parasitic and free-living phases in the life cycle. which the scientific name consists of the genus and These organisms may be very different and difficult to species is used.1-3,8,12,14,17 These names generally are of recognize as belonging to the same species. Despite these Greek or Latin origin. In certain publications, the scien- difficulties, newer, more sophisticated molecular methods tific name often is followed by the name of the individual of grouping organisms often have confirmed taxonomic who originally named the parasite. The date of naming conclusions reached hundreds of years earlier by experi- also may be provided. If the name of the individual is in enced taxonomists. parentheses, it means that the person used a generic name As investigations continue in parasitic genetics, immu- no longer considered to be correct. nology, and biochemistry, the species designation will be On the basis of life histories and morphologic charac- defined more clearly. Originally, these species designa- teristics, systems of classification have been developed to tions were determined primarily by morphologic dif- indicate the relationship among the various parasite ferences, resulting in a phenotypic approach.
    [Show full text]
  • Developing Vaccines to Combat Hookworm Infection and Intestinal Schistosomiasis
    REVIEWS Developing vaccines to combat hookworm infection and intestinal schistosomiasis Peter J. Hotez*, Jeffrey M. Bethony*‡, David J. Diemert*‡, Mark Pearson§ and Alex Loukas§ Abstract | Hookworm infection and schistosomiasis rank among the most important health problems in developing countries. Both cause anaemia and malnutrition, and schistosomiasis also results in substantial intestinal, liver and genitourinary pathology. In sub-Saharan Africa and Brazil, co-infections with the hookworm, Necator americanus, and the intestinal schistosome, Schistosoma mansoni, are common. The development of vaccines for these infections could substantially reduce the global disability associated with these helminthiases. New genomic, proteomic, immunological and X-ray crystallographic data have led to the discovery of several promising candidate vaccine antigens. Here, we describe recent progress in this field and the rationale for vaccine development. In terms of their global health impact on children and that combat hookworm and schistosomiasis, with an pregnant women, as well as on adults engaged in subsist- emphasis on disease caused by Necator americanus, the ence farming, human hookworm infection (known as major hookworm of humans, and Schistosoma mansoni, ‘hookworm’) and schistosomiasis are two of the most the primary cause of intestinal schistosomiasis. common and important human infections1,2. Together, their disease burdens exceed those of all other neglected Global distribution and pathobiology tropical diseases3–6. They also trap the world’s poorest Hookworms are roundworm parasites that belong to people in poverty because of their deleterious effects the phylum Nematoda. They share phylogenetic simi- on child development and economic productivity7–9. larities with the free-living nematode Caenorhabditis Until recently, the importance of these conditions as elegans and with the parasitic nematodes Nippostrongylus global health and economic problems had been under- brasiliensis and Heligmosomoides polygyrus, which are appreciated.
    [Show full text]